*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #2563eb;
    --primary-light: #dbeafe;
    --primary-dark: #1d4ed8;
    --success: #16a34a;
    --success-light: #dcfce7;
    --warning: #d97706;
    --warning-light: #fef3c7;
    --error: #dc2626;
    --error-light: #fee2e2;
    --bg: #f1f5f9;
    --card: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

.app {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

.app-header {
    text-align: center;
    margin-bottom: 24px;
}

.app-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Stepper */
.stepper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.step-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    cursor: default;
}

.step-number {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--border);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.3s;
}

.step-item.active .step-number {
    background: var(--primary);
    color: #fff;
}

.step-item.completed .step-number {
    background: var(--success);
    color: #fff;
}

.step-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.step-item.active .step-label {
    color: var(--primary);
    font-weight: 600;
}

.step-connector {
    width: 30px;
    height: 2px;
    background: var(--border);
    margin: 0 4px;
    margin-bottom: 18px;
}

/* Step Content */
.step-content {
    display: none;
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 28px;
    margin-bottom: 16px;
}

.step-content.active {
    display: block;
}

.step-content h2 {
    font-size: 1.25rem;
    margin-bottom: 4px;
}

.step-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

/* Upload zones */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-muted);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.upload-zone-small {
    padding: 20px;
}

.upload-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.upload-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
    display: block;
}

/* Preview card for signature image */
.preview-card {
    margin-top: 16px;
    padding: 12px;
    background: var(--bg);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
}

.preview-card img {
    max-height: 80px;
    max-width: 200px;
    border-radius: 4px;
}

/* File info */
.file-info {
    margin-top: 12px;
    padding: 10px 14px;
    background: var(--primary-light);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.9rem;
}

/* Forms */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.9rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-row {
    display: flex;
    gap: 12px;
}

.form-row .form-group {
    flex: 1;
}

/* Mode tabs */
.mode-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 16px;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
}

.tab-btn {
    flex: 1;
    padding: 10px 16px;
    border: none;
    background: var(--bg);
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.tab-btn.active {
    background: var(--primary);
    color: #fff;
}

.mode-panel {
    display: none;
}

.mode-panel.active {
    display: block;
}

/* Directory results */
#dir-results ul {
    list-style: none;
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-top: 8px;
}

#dir-results li {
    padding: 6px 12px;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--border);
}

#dir-results li:last-child {
    border-bottom: none;
}

#dir-count {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.text-warning {
    color: var(--warning);
    font-size: 0.9rem;
}

/* Preview container */
.preview-container {
    margin-top: 12px;
    text-align: center;
    overflow: auto;
}

.preview-wrapper {
    position: relative;
    display: inline-block;
    cursor: default;
}

.preview-wrapper img#page-preview {
    max-height: 70vh;
    max-width: 100%;
    display: block;
    border: 1px solid var(--border);
    border-radius: 4px;
}

/* Overlay boxes */
.overlay-box {
    position: absolute;
    cursor: move;
    user-select: none;
    touch-action: none;
}

.firma-box {
    border: 2px solid var(--success);
    background: rgba(22, 163, 74, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.firma-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    pointer-events: none;
}

.firma-box:hover,
.firma-box.dragging {
    border-color: var(--success);
    box-shadow: 0 0 0 2px rgba(22, 163, 74, 0.3);
}

.texto-box {
    border: 2px solid var(--primary);
    background: rgba(37, 99, 235, 0.1);
    padding: 2px 6px;
    font-size: 10px;
    color: var(--primary);
    white-space: nowrap;
    font-weight: 600;
    display: flex;
    align-items: center;
}

.texto-box:hover,
.texto-box.dragging {
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.3);
}

.resize-handle {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 16px;
    height: 16px;
    cursor: nwse-resize;
    background: linear-gradient(135deg, transparent 50%, var(--success) 50%);
    opacity: 0.7;
}

.resize-handle:hover {
    opacity: 1;
}

/* Preview controls */
.preview-controls {
    margin-bottom: 12px;
}

/* Position info */
.position-info {
    margin-top: 12px;
    padding: 12px;
    background: var(--bg);
    border-radius: var(--radius);
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.85rem;
}

.pos-item {
    display: flex;
    gap: 8px;
    align-items: center;
}

.pos-label {
    font-weight: 600;
    color: var(--text-muted);
}

/* Results */
.results-loading {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 12px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

#results-summary {
    padding: 16px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 0.95rem;
}

#results-list {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 16px;
}

.result-item {
    padding: 8px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    font-size: 0.85rem;
}

.result-item:last-child {
    border-bottom: none;
}

.result-item.success {
    background: var(--success-light);
}

.result-item.error {
    background: var(--error-light);
}

#results-actions {
    text-align: center;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--border);
}

.btn-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background 0.2s;
}

.btn-remove {
    color: var(--error);
}

.btn-remove:hover {
    background: var(--error-light);
}

/* Wizard nav */
.wizard-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

/* Toast */
#toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    color: #fff;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    max-width: 360px;
}

.toast.success { background: var(--success); }
.toast.error { background: var(--error); }
.toast.warning { background: var(--warning); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Responsive */
@media (max-width: 600px) {
    .app {
        padding: 12px;
    }

    .step-content {
        padding: 16px;
    }

    .form-row {
        flex-direction: column;
    }

    .stepper {
        gap: 0;
    }

    .step-connector {
        width: 16px;
    }

    .step-label {
        font-size: 0.65rem;
    }

    .position-info {
        flex-direction: column;
        gap: 8px;
    }
}